LIFTING DEVICE LINEAR MOTOR PRIMARY ELEMENT Russian patent published in 1995 - IPC

FIELD: linear motors of lifting equipment. SUBSTANCE: tubular linear primary element is made up of many core groups, each made of great number of plates arranged to form a pack of rack shape. Each plate has many teeth and slots. Core groups are radially paired around longitudinal axis by means of clamping and connecting device with middle part in form of clip. Device has at least one reinforcement plate installed in slots of core groups arranged at equal distance from one of edges of primary element. Its width is greater than width of other slots by value of summary width of tooth and slot. Hold-down is secured between adjacent groups or packs of core on outer periphery of reinforcement plate by means of bolts inserted through holes in hold-down and turned into threaded holes in square nut installed in slot of reinforcement plate. EFFECT: enlarged operating capabilities. 4 cl, 14 dwg